Exam answers are legitimately available, at a very reasonable price, for the ATPL. I would regard that as more important, since it's usually used for carrying paying passengers. All the more reason to sort the men from the sheep, by memorising the # of axes carried on Concorde
Many ATPL candidates are going around JAA states in search of a colour vision test which they can pass. So much so that the CAA commissioned a study of the subject which (gosh what a suprise) found that all but one of the colour vision tests in current use (the WH lantern) are basically meaningless. The PDF is on their website somewhere; I read it a while ago. It's a scandal; how many people failed the Isihara plates and gave up, never knowing it's a useless test of any practical colour vision ability.